print('Wellcome to the leap year App')

year = int(input('Enter the year: '))

if year % 4 == 0:
    if year % 100 == 0:
        if year % 400 == 0:
            print('It\'s a leap year')
        else:
            print('It\'s not a leap year')

    else:
        print('It\'s a leap year')
else:
    print('It\'s not a leap year')